# final

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## final's Activity

1. final added a post in a topic

so what do you know, I was wondering who the anguor was, thought i was missing something. I dont know much about old philosophers so i just put it hoping people would assume i knew who he was.

anywho i wrote a quick program (that wasnt that quick to write). that outputted all possibilities. that didnt do much for me. So i output random 300. scanned for a common word and noticed(maybe by luck) the high probability of a for, you,your, or youre. So i eliminated all that didnt have one of those. This was still way too many. so i eliminated all that had more then 4 consonants in a row. while this was half lucky it was probable and worked. i had spaces in my array where the numbers were in the matrix so i actually eliminated all that had 5 non vowels in a row with spaces included. this caused some 4 consonants to not be eliminated but the effect was the same. anyway this limited it to 147.

at this point it was an issue of did i want to scan it or take probable guesses at more restrictions

I decided to take another chance eliminating all that had 4 vowels in a row limiting it to 133.(big whoop)

anyway at this point i scanned decided to eliminate all starting with vowels (101)

at this point the lack of progress made me just scan and I found it. My plan was if I didnt find it, to slowly weaken the restrictions, while eliminating the ones that fit the previous restrictions, but didnt really need too when i saw the answer. anyway

bushindo,

I was wondering how did you compare it to that many words, I left it as a array of chars so i had to do

if(...='y'&&...+1='o'&&...+2='u')

did you do that for all of them by a loop going through the array of the words you were checking against?
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2. final added a post in a topic

im pretty sure i got it

and for the record im dumb again
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3. final added a post in a topic

wow that program was vaguely annoying to write but your right i got a significantly different answer and i dont know if you just werent going to hint at my mistake or didnt catch it but here it is (still unsolved tho)

?

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4. final added a post in a topic

i get

think this works but the number does seem too simple
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5. final added a post in a topic

i realized alot of the inconsistencies with this problem but i found the integral and was having trouble solving it (i normally do when theres trigonometry and quotient). That was when the equation for the angle wasn't linear though i in all honesty havent done these problems with these values. Anyway I realized that the value at the beginning is infinite and was going to impose a max velocity on the car but then forgot after it took longer to explain the concept then normal.

and as for the last part i dont know if you mean the bank in the roads or the turn, but i dont beleive this is harder to accept then the lack of forward acceleration while magically being at different velocities. I simply remembered that old problem and then thought of a what if problem and here we are. Anyway Ill solve these later.
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6. final added a post in a topic

7. final added a post in a topic

basically you got it right but it is a common formula to use a=v2/r where A is acceleration a vector orthogonal to the velocity. This if there is constant speed(not velocity). I am saying the angle of the road changes and this ideal speed changes to. If you can magically be going this ideal speed at every moment what is the time it takes. I simply meant you did not need to use acceleration in the direction of your velocity (though you can) you could consider the speed magically optimal at all times.

so for number 3(which i accidentally never numbered)

r=20m
theta=x/90
x is distance traveled from start of problem

so at the end of this problem which really is the middle of a turn your at
theta=(2pir/4)/90=10pi/90=pi/9
mu =.3

as for louge i meant ice luge it was the best example I had
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8. final added a topic in New Logic/Math Puzzles

I was remembering back into when I first learned physics I (kinematics) and I remembered a problem that at first gave me some trouble.

A car on a race track has a turn that is a perfectly circular pi radian turn with radius 20 m. The track is angled at theta. (this angle is the angle the track makes with a perfectly horizontal base in the direction of the perfectly vertical). You have to figure out the maximum speed that is possible on the turn. For this problem you want to find the equilibrium point so that the car does not move vertically up or down the track.

Three questions (for gravity use 9.81)

1. Without friction on the track what is the ideal speed if theta is pi/18?

2. What about if you have a coefficient of static friction of .3 with angle pi/18?

now when i went back to these problems i realized they weren't as hard as they seemed in highschool. so I thought of another problem and have not solved it yet (cant think of how to proceed from where im at, but i haven't tried a linear example) , what if the angle was variable. For example a louge flat on the straight away but banks on the turn.

Now to simplify so the equation of the angle can be linear and not make things as complicated, the turn is now only pi/2 radians. So say the function that defines theta is theta=g(x)=(x/90) with x equaling the distance traveled in meters. What is the time it takes to make this quarter circle turn. for simplicity imagine that the car can be at any speed instantaneously and acceleration in the direction of your velocity is zero. the coefficient of static friction is still .3
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9. final added a post in a topic

yah well i started by hand and i eliminated anything that would make any one start with 111-- definitely and 11--- probably but after writing a couple of the still viable answers down i decided to write the program. The magic of computers.
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10. final added a post in a topic

oh no i was just kidding i got the answer, I used a program to out put all possible answers and found it among the giberrish ones
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11. final added a post in a topic

so that way was a little easier to program and Im so dense bonanvas response sailed right over my head when i first read the problem and once i figured out what i was really suppose to do I didnt reread it. I still am a little lost on bushindo's response but I can never fully understand what he says anyway. Is there a way to do this other then the program or brute force method. I know there's some quick eliminations you can do, but other then that the brute force method would have taken a while.

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12. final added a post in a topic

so at first when i read this i thought you said/meant bitwise operations. And well I found out (or my program did) that and,or,not,xor all dont work if anyone cared. but im thinking now (as i reread it) you mean that the numbers are just ordered differently in a consistent way. anyway whether i messed up or misread it im done thinking about it for right now maybe later.
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13. final added a post in a topic

is the second to last letter capital i I or lowercase L l? I assume its uppercase since all the other letters are but just wanna make sure before i try
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14. final added a post in a topic

right but i dont know y

i tried recursion but my brain hurts currently, so this is the best i got now
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15. final added a post in a topic

I dont know why i didnt think of something so simple. I thought about choosing x axis first then out of the possible y's, but that obviously wouldnt work, so i used polar but then you informed me that isnt uniform either i didnt even think about just randomly choosing and then deleting the bad ones but anyway heres some numbers

as bonanva said cartesian 7.4%
polar coordinates 4.6%
sampling across the whole rectangle but dividing by the circles area 19.5%
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